 /*******************************************************************************
  * Copyright (c) 2005, 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/

 package org.eclipse.core.runtime.internal.adaptor;

 import java.io.IOException ;
 import java.net.URLConnection ;
 import java.util.Properties ;
 import org.eclipse.osgi.baseadaptor.*;
 import org.eclipse.osgi.baseadaptor.hooks.AdaptorHook;
 import org.eclipse.osgi.framework.adaptor.FrameworkAdaptor;
 import org.eclipse.osgi.framework.internal.core.FrameworkProperties;
 import org.eclipse.osgi.framework.log.FrameworkLog;
 import org.eclipse.osgi.framework.log.FrameworkLogEntry;
 import org.osgi.framework.BundleContext;
 import org.osgi.framework.BundleException;

 public class EclipseErrorHandler implements AdaptorHook, HookConfigurator {
     // System property used to prevent VM exit when unexpected errors occur
 private static final String PROP_EXITONERROR = "eclipse.exitOnError"; //$NON-NLS-1$
 private BaseAdaptor adaptor;

     public void frameworkStart(BundleContext context) throws BundleException {
         // do nothing
 }

     public void frameworkStop(BundleContext context) throws BundleException {
         // do nothing
 }

     public void frameworkStopping(BundleContext context) {
         // do nothing
 }

     public void addProperties(Properties properties) {
         // do nothing
 }

     public URLConnection mapLocationToURLConnection(String location) throws IOException {
         // do nothing
 return null;
     }

     private boolean isFatalException(Throwable error) {
         if (error instanceof VirtualMachineError ) {
             return true;
         }
         if (error instanceof ThreadDeath ) {
             return true;
         }
         return false;
     }

     public void handleRuntimeError(Throwable error) {
         // this is the important method to handle errors
 boolean exitOnError = false;
         try {
             // check the prop each time this happens (should NEVER happen!)
 exitOnError = Boolean.valueOf(FrameworkProperties.getProperty(EclipseErrorHandler.PROP_EXITONERROR, "true")).booleanValue(); //$NON-NLS-1$
 String message = EclipseAdaptorMsg.ECLIPSE_ADAPTOR_RUNTIME_ERROR;
             if (exitOnError && isFatalException(error))
                 message += ' ' + EclipseAdaptorMsg.ECLIPSE_ADAPTOR_EXITING;
             FrameworkLogEntry logEntry = new FrameworkLogEntry(FrameworkAdaptor.FRAMEWORK_SYMBOLICNAME, FrameworkLogEntry.ERROR, 0, message, 0, error, null);
             adaptor.getFrameworkLog().log(logEntry);
         } catch (Throwable t) {
             // we may be in a currupted state and must be able to handle any
 // errors (ie OutOfMemoryError)
 // that may occur when handling the first error; this is REALLY the
 // last resort.
 try {
                 error.printStackTrace();
                 t.printStackTrace();
             } catch (Throwable t1) {
                 // if we fail that then we are beyond help.
 }
         } finally {
             // do the exit outside the try block just incase another runtime
 // error was thrown while logging
 if (exitOnError && isFatalException(error))
                 System.exit(13);
         }
     }

     public boolean matchDNChain(String pattern, String [] dnChain) {
         // do nothing
 return false;
     }

     public void addHooks(HookRegistry hookRegistry) {
         hookRegistry.addAdaptorHook(this);
     }

     public FrameworkLog createFrameworkLog() {
         // do nothing
 return null;
     }

     public void initialize(BaseAdaptor adaptor) {
         this.adaptor = adaptor;
     }
 }

